Look into the manual and see if your problem is handled there.
Since you are reading this, you already have done this! If the manual does not solve your problem, it is time to have a look at our web site.
You'll find the support section at our web site at http://www.infinity-loop.de/support/. There, we post important information about downCast at the FAQ (Frequently Asked Questions) page in order to keep you informed. If this does not help either, submit a support request and/or a bug report.
You have found a bug. Please let us know! We strive to deliver high quality software that suits your needs. However, there are so many little variations possible in RTF coding (RTF dialects) that some constellations might occur which we have simply not foreseen.
If you have found one, please email us with a detailed description and, if you can, please send along the complete document that is causing the problem so that we can recreate the problem in our labs.